quasar | 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e

General

Target

4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe
Size

3.4MB
MD5

b67f56e12c03b65821eb83a0d64cc7f1
SHA1

7f482ecb55a7193dc5e0003a5dd4b0e7748d6dca
SHA256

4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e
SHA512

d64f6ac83237b92869e26b3db2131b64814a3acc2106790cc0b89e769336dac4f40ae4576a93d6f6abe727eed5f5b997d6e04eec8618f8cc5155662286854118
SSDEEP

49152:zvyI22SsaNYfdPBldt698dBcjHYXLBmzA/oGd0giTHHB72eh2NTm:zvf22SsaNYfdPBldt6+dBcjHYXL9E3

Score

10^/10

quasar iwantusamo spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Iwantusamo

C2

98.51.190.130:20

Mutex

de054988-dbed-49f6-834a-dda51ccd494b

Attributes

encryption_key
28DB6A992E078CF6FE82A1042CC979D37C6466CE
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2188-1-0x0000000000BB0000-0x0000000000F16000-memory.dmp	family_quasar
behavioral1/files/0x0008000000017530-6.dat	family_quasar
behavioral1/memory/2776-9-0x0000000000D50000-0x00000000010B6000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2776	Client.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2820	schtasks.exe
2864	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2188	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe
Token: SeDebugPrivilege	2776	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2776	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 2820	2188	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe	30
PID 2188 wrote to memory of 2820	2188	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe	30
PID 2188 wrote to memory of 2820	2188	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe	30
PID 2188 wrote to memory of 2776	2188	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe	32
PID 2188 wrote to memory of 2776	2188	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe	32
PID 2188 wrote to memory of 2776	2188	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe	32
PID 2776 wrote to memory of 2864	2776	Client.exe	33
PID 2776 wrote to memory of 2864	2776	Client.exe	33
PID 2776 wrote to memory of 2864	2776	Client.exe	33

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe
"C:\Users\Admin\AppData\Local\Temp\4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2188
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2820
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2776
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.4MB

MD5
b67f56e12c03b65821eb83a0d64cc7f1

SHA1
7f482ecb55a7193dc5e0003a5dd4b0e7748d6dca

SHA256
4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e

SHA512
d64f6ac83237b92869e26b3db2131b64814a3acc2106790cc0b89e769336dac4f40ae4576a93d6f6abe727eed5f5b997d6e04eec8618f8cc5155662286854118

Download Submit
memory/2188-0-0x000007FEF4EB3000-0x000007FEF4EB4000-memory.dmp

Filesize
4KB

Download
memory/2188-1-0x0000000000BB0000-0x0000000000F16000-memory.dmp

Filesize
3.4MB

Download
memory/2188-2-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

Filesize
9.9MB

Download
memory/2188-8-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

Filesize
9.9MB

Download
memory/2776-9-0x0000000000D50000-0x00000000010B6000-memory.dmp

Filesize
3.4MB

Download
memory/2776-10-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

Filesize
9.9MB

Download
memory/2776-11-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

Filesize
9.9MB

Download
memory/2776-12-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads